Add "AcceptErrorsNonFatal" directive

This tweaks accept() failure processing by having ap_unixd_accept
pass more errors up, and having the MPM's check against a macro
to see if they are in a whitelist of non ENETDOWN/EMFILE kind 
of potential process-wide errors.

Default behavior is still to exit.

edit: MMN bump in 1820099.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1820098 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 6 insertions, 0 deletions

diff --git a/os/unix/unixd.c b/os/unix/unixd.c
index 43645f09da..b939355289 100644
--- a/os/unix/unixd.c
+++ b/os/unix/unixd.c
@@ -320,6 +320,12 @@ AP_DECLARE(apr_status_t) ap_unixd_accept(void **accepted, ap_listen_rec *lr,
     if (APR_STATUS_IS_EINTR(status)) {
         return status;
     }
+  
+    /* Let the caller handle slightly more varied return values */
+    if (lr->use_specific_errors && ap_accept_error_is_nonfatal(status)) { 
+        return status;
+    }
+
     /* Our old behaviour here was to continue after accept()
      * errors.  But this leads us into lots of troubles
      * because most of the errors are quite fatal.  For